Nut-lock.



'No. 755,806. 1 PATENTED MAR. 29, 1904. I

- C. F. SPBRY.

NUT LOOK. APPLIOATIOH FILED JAN. 2H6, 1904.

N0 MODEL.

"UNIT-ED. STATES v Patented'March 29, 1904.

PATENT OFF CE.

CHARLES F. SPERY, OF ROCKFORD, ILLINOIS, ASSIGNOR OF TW'O I HIRiDS TO LEWIS A. WVEYBURN, OF ROCKFORD, ILLINOIS. i Q

NUT-LOCK.

SPEGIFIGATIONforming part of Letters Patent No. 755,806, dated March 29, 1904.

Application filed January 26, 1904. Serial No. 190,756. (No model.)

.To all whom it-may cancer-m Be it known that I, CHARLES F. SPERY, a citizen of the United States, residing at Rockford, in the county of vWinnebago and State of Illinois, have invented certain new and useful Improvements in. Nut-Locks, of which the following is a specification. 1 I

The object of this invention is to construct a nut-lock comprising two sections one of which is compressed by the actionof the other upon it and so arranged that in' seeking to separate the sections an impinging action will take place between them.

In the accompanying drawings, Figure 1 is an isometrical representation of my improved ,nut-lock 1n place in connectlon with a bolt.

Fig. 2 is an isometrical representation of the nut proper. Fig. 3 is an isometrical representation of the compressible section.

The bol- 1 is of the ordinary construction, having the screw-threaded section The nut proper, 3,- has a screw-threaded opening 4 and an enlarged cavity 5, as shown at Fig. 2. Y

The compressible section (shown at Fig. 3)

, comprises the headed portion 6 and conicalshaped portion 7. The head and conical portions are nearly separated by the slot 8.. The

two sections of the conical portion are in eccentric form, as shown'at Fig, 3, which leaves two extending projections 9 and 10 diametrically opposite each other.

In use the compressible section is turned onto the bolt up against the work, the fiat side I of the head in contact with the work. The nut proper is then turned onto the bolt, its concave face receiving the cone-shaped projection of the compressible section. As the nut proper is turned up the scre'w-tln'eaded opening in the compressible section being 4 larger than the bolt allows the cone-section to compress; which will exert an increased pressure against the inner surface of the concave face of the nut proper, and in umlertakingto' remove the nut proper the sharp projections 9 and 10 will bite into the surface of the nut proper and hold it firmly in position on the bolt. f

I. do not-mean that the nut proper cannot be removed,-but that itis-hcld in position 5 with greater force than it simply turned up against the work without the compressible section and with suiiicient force to'preventit becoming accidentally displaced.

I claim as my invention A nut lock comprising two internally- I threaded sections, the one having a conical cavity, and the other a substantially conical projection, co nposed"(ifpppositely -arrangcd ecce'ntric portions separated by a longitudinal slot extending through the cone and one wall of the corresponding section, substantially as i set forth.

CHARLES F. SPICRY.

Witnesses: v

i -A. 0. Beam,

L. A. \VnrnUnN. 

